There are some key elements which distinguish a general operating system, such as Linux, from a Real Time operating system, such as OSE. The later belongs to the category of soft Real Time systems while Linux is a general operating system, with significantly improved real time properties after version 2.6. These improvements make it interesting to compare the two systems.When comparing two operating systems, there are a number of issues which have to be considered. One way to measure the performance of the systems is by studying the time consumption for the same functionality and hardware.During the study, the items that appeared as the most important for the performance of the systems, were: process primitives, system primitives, interprocess communication, context switches and interrupt latency.This work demonstrates that it is possible and reasonable to do performance testing on two different operating systems. The implemented tests cover a number of basic functionalities, which appeared to be the most crucial ones for the performance of the systems..

LIBRIS is a national library search engine offering information about 6 million books, articles, dissertations and other materials held by Swedish university libraries, research libraries and public libraries. In December 2007 a new version of LIBRIS was launched, developed with focus on usability, simplicity and accessibility. This thesis examines how the new LIBRIS is used, what is working well and what could be improved and also what the users think of LIBRIS. The following report is based partly on a study of usability and partly on a series of tests where librarians, scientists, students and developers have executed a number of tasks while thinking aloud. The users also participated in an interview.

The aim of this study was to examine creativity, measured with four different tests, and self-image in 18-19 year old women (N = 30), and their earlier presence of imaginary companions. The result showed that there were many correlations between the different creativity measurements. Self-image correlated significant with fluency of ideas in one test. "Psychological health" along with "skills, talent and abilities" were the two most important self-image aspects for creativity. We found negative relationships between imaginary companions and creativity, but a positive relationship with self-image.

The purpose of this Master Thesis is to analyze what suitable hardware platforms there are on the market in order to build a low price control and information system for mobile applications, called small display module. The thesis will be underlying material for making a decision for further development. The result of the thesis consists mainly of a Windows CE kernel and a schematic for a CPU card, on which it would be suitable to build the display module. Another major part of the report is the introduction of different techniques that could be of interest when designing a processor based system. The processor architecture that was chosen is the x86.

An increasing number of applications are becoming more or less network based today.The traditional architecture for network based applications is client-server, but as usageof download services are going up, so is the Peer-to-Peer architecture. This report is acomparison between the Peer-to-Peer and client-server model, and can serve as a basiswhen a decision between them needs to be taken. In the report, the performancebetween the different architectures is compared in different contexts. Our basis is ageneral implementation of both architectures in a test that is derived from a previousreport. On top of this, the performance of the different architectures are measured,implemented in a gaming-context.

The security solutions used in wireless home networks are examined in this report. Thegrowing number of wireless units have increased the need for reliable security solutions.This report aims to enlighten the reader about the fundamental technology used inwireless security solutions and inform about the existing flaws. A recommendationabout how to achieve a high level of security in the home network is also given to thereader.Several flaws in the security solutions in use have been reported. Of these the mostsevere has been examined in a test network using highly accessible tools to get aperception of how vulnerable the user is.The tests showed that several attacks were efficient and easily carried out. We have alsoseen that several of the home networks in our sample are susceptible to these attacks.Our survey revealed that the Internet service provider's technical support in many caseslacked the knowledge necessary to inform the user about reliable security solutions..

Nimo Verken AB is the leading producer in the Scandinavia of drying cabinets. The construction has, with small changes, been the same since the 70s with a thermostat and a timer as controlling system. There was a wish to develop a modern cabinet which showed remaining time on a display and with energy saving functions.In this report we go through how it is possible to implement a digital controlling system, where remaining time is shown on a display and where it is possible to choose a preset ?program?.The report first presents the fundamental theory for a PIC, where we describe the different registers, how interrupts are handled, the internal clock function and how data is sent to control the different parts of the construction.Next the report presents and describes the new hardware that is needed, such as the encoder, the temperature sensor and the display.After the theory we describe how the program in the PIC may be drafted. Last in the report we have the result of the tests of the temperature variations and the accuracy of the time..

The design process of an interaction design student is mostly collaborative and computer oriented. Based on this, it?s hard to believe that we have not yet found a tool that will facilitate our needs. With this in mind, which elements do we need to promote collaboration in a virtual design process? This thesis will include design processes, collaboration, creativity and virtual awareness, amongst others.

This Master Thesis documents the development of an On Board Diagnosis (OBD-II) interface for remote diagnosis of vehicles. The Master Thesis is part of a project at the company Wayfinder Systems in Lund. The purpose of this thesis was to design a scantool that communicates with a vehicle through its OBD-II port using relevant standards. In order to make the OBD-II interface development easier, a car simulator was first built. Both the car simulator and the OBD-II interface were implemented using a linux computer running a C-program with serial communication with an external electrical interface.

Genomic selection (GS) is used for selection of breeding animals of dairy cattle. GS is though not as extensively used within the beef industry. One reason for that is the low accuracy (rTI) of the breeding value that is of great importance for the final genetic gain. Causes to the low accuracy are high effective population size, a small reference population and a genetically differentiated population. There is however a market for genomic selection with High Density (HD) tests for beef cattle.

Bakgrund: Dieter får allt större utrymme i media samtidigt som allt fler följer någon diet.Syfte: Syftet var att undersöka varför vuxna personer i Sverige valt att följa någon form av diet. Vidare undersöktes bland annat socioekonomiska faktorers inverkan på valet av diet.Metod: En webbaserad enkät distribuerades via Facebook där 235 personer deltog genom ett bekvämlighetsurval. Enkäten bestod av 23 slutna frågor. Svaren sammanställdes och analyserades i IBM SPSS Statistics 21.0. Resultaten analyserades med hjälp av Chi-2 test, Mann Whitney U test samt boxplots.

The report handles the transmission of signals from piezoresistive pressuresensors and thermocouple from a rotating object. This report also evaluates the possibility to collect data in a datalogger that rotates with the object. Telemetrics was previously used for signaltransmission in Finspång, therefore there has been no tests considering preassure measuring. One transmitting method handled in this report is transmission through a slipring connection. One test with a slipring connection was performed for transmitting signals from a piezoresistive preassuresensor.

Shear Strength and Deformation Characteristics of Uppsala Clay with CRS and Standard OedometerTyra Morell Bonin & Magdalena MählerTo see how much a clay compact under different pressure one can use several different methods and in this project, two methods were used, the Standard Oedometer and a CRS apparatus. A Standard Oedometer is a full-time manual device and the CRS apparatus is a modern electric and automatic device. The aim of the project was to see similarities and differences between the two methods and examine which method that were most reliable. This has been done with repeated laboratory tests and afterward evaluations. With this information one can get a picture of how the clay will behave and how it will deform in nature.

Syfte: Syftet med denna studie var att undersöka om det finns skillnad i rörelsekontroll av ländryggen mellan personer med ospecifik ländryggssmärta och friska.Metod: Två sjukgymnaster bedömde hur 36 videofilmade försökspersoner (18 personer med ospecifik ländryggssmärta och 18 friska) klarade att utföra de tre testen; stående knälyft, statiskt och dynamiskt utfallssteg. Bedömarna, som var vana att bedöma rörelsekontrolltest, granskade videofilmerna och antalet icke korrekt utförda delmoment av testen antecknades på ett standardiserat protokoll. Analys av skillnader i rörelsekontroll mellan grupperna avseende antalet icke korrekt utförda delmoment beräknades med Mann-Whitney U test. För analys av skillnader mellan grupperna avseende antalet personer med helt korrekt utförda test användes Chi 2-test. Signifikansnivån sattes till p<0.05.Resultat: Ingen signifikant skillnad i rörelsekontroll mellan grupperna påvisades för antalet icke korrekt utförda delmoment för alla test sammantaget (p= 0.15) eller för de tre testen var för sig (stående knälyft p= 0.39, statiskt utfallssteg p= 0.13, dynamiskt utfallssteg p= 0.06).

Psykosrelaterade diagnoser är de mest förekommande diagnoserna bland rättspsykiatriskt vårdade patienter inom den rättspsykiatriska vården. Dessa patienter riskbedöms för framtida våld och i vården ingår riskhanteringsarbete, vilket sker innan patienterna skrivs ut eller överförs till annan vårdform. Syftet med studien var att beskriva dömda rättspsykiatriska patienter med psykosrelaterade diagnoser, vilka lämnat den slutna rättspsykiatriska vården vid Rättspsykiatriska regionkliniken i Sundsvall mellan åren 2005-2010. Beskrivningen fokuserades på patienternas riskbedömning för våld med HCR-20, vart patienterna hade skrivits ut eller hade överförts samt deras nya lagföringar. Patienter med och utan psykosrelaterad diagnos jämfördes med varandra.